Hoist



y 2, 1929- D. s. KIMMERLE 1.719.297

HOIST Filed Oct. 26, 1927 2 Sheets-Sheet l v INVEN TOR. 23am 1 im- WM.

Jud/ M I TORNEYS.

y 1929- D. s. KIMMERLE 1.719.297

HOIST Filed Oct. 26, 1927 2 Sh eets-Sheet 2 IN VEN TOR.

A TTORNEYS.

Patented July 2, 1929.

UNITED STATES DANIEL S. KIMMERLE, F $AN FRANCESCO, CALIIFORIIIll., ASSIGNOR 'lO KIMMERLE maze? PATENT orsics.

BROS, A COPARTNERB'HI]? CONSISTING OF DANIEL S. KIMIEEERLE, LARNELD T. KIM- MEB LE, AND BILLY F. KIIVIMERLE, ALL 01 SAN FRANCISCO, CALIFORNIA.

HOIST.

Applicationfiled October 26, 1927. Serial No. 228,760.

a common gear reduction drive for driv-.

ingeither drum to provide l'neans whereby power from the reduction. gear drive may be transmitted to drive eitherdrmn; to provide m ans for lochin the drums against rotation. in one direction to support a load; and. further to provide a hand brake to allow lmverinp, of a load when one ot the drums is disengaged. The hoist is shown. by way of illustration in the accompanying drawings in which: a a s a Fi 1 a side elevation of a wrecking crane showing the hoist connected therewith,

Fig. 2 is an end view of the hoist,

Fig. 3 is a plan View of the hoist,

Fig. 4; is a longitudinal section of the small drum and the clutch and gear cooperating therewith. y

Referring to the drawings in detail and particularly F 1, A indicates a base'or other suitable support on which is mounted a mast I? supported in the-usual manner by stays or the like indicated at 2; The mast carries a boom armC, a block D, sheaves 3 and 4t, and the mast similarly carriessheaves as indicated at 5 and 6, there being double sets of sheaves at the points 5 and 61 The hoist forming the application is generally indicated at E. It

isprovided with two drums indicated at F and. G. The small drum F carries a cable 6 which passes over the sheaves 5 and 6 and which is attached to the upper end of. the boom as at 7 so as to raise and lower the boom. The drumG- carries a cable 8 which also passes over the sheaves 6 and5 an d. then over the sheaves t and 3, the block D, and being finally secured at the point 9.

is merely illustrated so that the function of the hoist will be clearly understood; The hoist.

ratios may be obtained subject matter of the present The general crane structure and the methodof ion, but

proper consists of a frame generally indicated at H. This frame nitably secured on the basemember A and it is provided with hearing members such as indicated at 10-1() and 1l-1l in which are ournaled shafts l2 and 13. These shafts extend crosswise of the frame H and'the drums l and Gare supported thereby, being Fixed to theshaft 13 by key or otherwise is an elongated die-living; pinion 14. Fixed to the shaft 19, bylrey oil the like is a gear 15 and a pinion 1G, and formed integral with the drum G or secured thereto is an inter-meshing gear l7; also tixedon theshaft 12 grooved collar 18 and engaging therewith is a forked end 19- of a shifting lever 20. This lever is adapted to assume one of thetwo positions indicated in Fig. 3 i one position to another it transmits a loner tudinal movement to the shaft 12 and the gears 15 and 1G. The driving pinion let is suiciently long to maintain mesh with the gear 15 regardless of the position it assumes but the pinion 16 when shifted with the shaft with the gear 17 or is moved oil gear i'or purposes herein- 12 either meshes completely out alter to be described.

Byreferring to Fig. 4c, it will be noticed that one end ot the drum F is enlarged indicated at 21 and that j aw clutch teeth 22 are formed interior thereof. Itwill also be noted that a jaw clutchmember 23 is secured on, shaft 12 and that when shaft 12 is moved longitudinally, the clutch member 23 will move into or out of mesh with the cooperating meniber 22. This isimportant as the clutch members 22'and 23 serve the function of freeing or securing the drum'li with rela Lion tothe shaft 12. llhedrumd? is secured against longitudinal movement when shaft 19, is

shifted, this being accoim'ilished by forming an annular groove 24; onthe enlargedend of i the drum into which projects a stationary guide or retaining arm 25.

teeth 26 which aregengaged by means of a spring actuatedpawl 27. Thisis also i1nthe function of locking portant as itserv the drum Fagainst rotation inone direction I when a load 1stobe supported. The drum G whichis freely'rotatable on shaft 13 is also provided with ratchet teethi These areclearfreely rotatable thereon,

and when shifted from The enlarged end of the drum is also provlded with ratchet dicated at 29. A pawl cooperates therewith and as such normally secures the drum against rotation in one direction and a load is thereby supported. The drum G is extendedas-indicated at 31iand this extended portion is surrounded by a friction or brake band 32 which is actuated by means of a brake lever 33, said lever being provided with a pawl 3a which engages ratchet teeth 35 to secure the brake lever when in'braking position. Pawl 30 which cooperates with the internal ratchet teeth 29 is provided with a load is to be lowered by brake action, lever 37 being moved from one position to another bymerely being kicked or pushed over by the foot of the operator. In actual operation, if it-is desiredto raise or lower the boom C,

it is only'necessary toshift the gears 15 and 16 to assume the dottedline position shown in Fig.3. .When this position is assumed jawfclutehes 22 and 23engage. If shaft 13 is rotated "by means of a hand crank or the likeas indicated at 40, power will be transmitted through the pinion 14 and gear 15 to rotate shaft .12 and power will inturn be transmitted through the jawclutch 22 and 23 torotate theclrum F The boom arm may'gthus beraised or lowered to assume any.

position desired, pawl 27 being held out of engagement with-the ratchet teeth 26 when lowering the boom. VVhenraising the boom the pawl. is thrown back into engagement with theratchet teetln thus seeuring the. boom when a desired, raised position is obtained, If. the block Disconnected with a load and itXis d esired to lift the same, gears 15 and 16 are shifted to the full line position shown in Fig, 3v andshaft13is again rotated. Power will the n be transmitted through the gear 14; to'rotate gears 15 and 16 and as gear16 will thenmesh with/the gear 17, drum G will-be 7 rotated at a materially reduced igear ratio gand a heavy load may be-lifted. If a compar'ativel-yi light load is handled, it is only necessary to transferthe-crank 40 from the shaft 1 3,to the shaft 12. The power will then be transmitted directly through the gear 16 ,tothe gear 17 and the drum, still at a reduced "gear ratio} After a load has been lifted to a a desired-- height, it is obvious that it will be held by the pawl 30.1 ,If it is desired to-lower the load, drum Gris locked. by ti ghtening the k br akeband 32. Leveri33'isthen swung to vert ealpositionto.release thepawl 30 and the brake band is thenslightly released by th'elleve'r 33 andthe load may thus be :frictionally lowered. The hoist here shown may, of course, be used wherever desired, but it is particularly adapted for wrecking cranes such as here illustrated. The single gear reduction drive employed may transmit power to either drum and at different ratios so that practically anyload desired may be handled. The mechanism employed is exceedingly simple to operate and as the structure as a whole is substantial and rigid, it may be handled by practically any individual whether mechanically skilled or otherwise. The shifting lever 20 may be secured in either of the positions shown in Fig. 3 by any suitable means. In the present instance, however, an ordinary latch such as indicated at 20" is illustrated, this latch engaging one or another of a pair of recesses formed in the top of the frame as indicated at 20".

lVhile certain features of the present invention are more or less specilicall y described, I wish it understood that various changes may be resorted to within the scope of the appended claims. Similarly, the materials and finishes of the several parts employed may be such as the manufacturer may decide or varying conditions or uses may demand.

Having thus described my invention, what I claim and desire to secure by Letters Patent 1s:

1. A hoist of the character described comprising a frame, a pair of interspaeed shafts journaled crosswise of the frame, a drmn on each shaft and free to rotate thereon, an elongated spur gear pinion secured on one shaft, a spur gear secured on a second shaft, a gear secured to the drum on the first-named shaft and adapted to mesh with a spur gear pinion on the second-named shaft, and means for rotating the first-named shaft to transmit power through the gears to rotate the drum on the first-named shaft.

2. A hoist of the character described comprising a frame, a pair of interspaced shafts journaled crosswise of the frame, a drum on each shaft and free to rotate thereon, an clongated spur gear pinion secured on one shaft, a spur gear secured on a second shaft, a gear secured to the drum on the first-named shaft and adapted to mesh with a spur gear pinion on the second-named shaft, means for rotating the first-named shaft to transmit power through the gears to rotate the drum on the first-named shaft, and means whereby the pinion on the second-named shaft may be moved out of engagement with the gear on the drum so that power may be transmitted from the first-named shaft through the gears to rotate the second-named shaft and the drum thereon.

3. A hoist of the character described comprising a frame, a pair of interspaced shafts journaled crosswise of the frame, a drum on each shaft and free to rotate thereon, an elon- Sill gated spur gear pinion secured on one shaft, a spur gear secured on the second shaft, a gear secured to the drum on the first-named shaft and adapteii. to mesh with a spur gear pinion on the second-named shaft, means for rotating the first-named shaft to transmit power through the gears to rotate the drum on the first-named shaft, means whereby the pinion on the second-named shaft may be moved. out of engagement with the gear on the drum so that power may be transmitted from the firstaiained sh aft through the gears to rotate the second-named shaft and the drum thereon, and a clutch on the secondnamed, shaft cooperating with the drum n'ioiu'ited thereon, said clutch cooperating with the pinion gear on said shaft in such a manner that when the pinion meshes with the gear which is secl'lred to the drum on the first-named shaft, a driving connection between the drum on the second-named shaft and the clutch is broken and when the gear pinion on the seeoi'idma led shaft is moved out ofmesh with the gear on the drum, the clutch will engage the drum on the second named shaft to rotate the same.

41:. A hoist of the character described comprising a frame, a main driving shaft 30m naied crosswise thereof, a second driving shaft journaled crosswise thereof, a main drum freely rotatable on the first shaft, a secondary drum freely journaled on the secwith the drum ond-named shaft, a gear secured to the main drum, a reduction gear drive adapted to transmit power to said gear and drum, a shiftable gear in said drive movable into and out of mesh with said gear, a shiftable clutch cooperating with the drum on the second shaft and movable in unison with said shift- 'able gear, said clutch being out of mesh with the drum when the shiftabie gear is in mesh gear, and being engaged with the drum when the shiftable gear is out of mesh with the gear on the drum.

5. A hoist of the character described comprising a frame, a pair of interspaced shafts journaied crosswise thereon, a free drum on each. shaft, a gear secured to one drum, a gear secured. to the shaft on which the drum is mounted, a pair of gears secured. to the other shaft, a jaw clutch on said. san'ie shaftand cooperating with the drum which is mounted on said shaft, and means whereby the gears and the clutch on the second named shaft are moved longitudinally in unison so as to maintain the clutch and drum disengaged when the gears 011 the second-named shaft mesh with the drum gear and the gear on the first-named shaft and so as to engage the clutch and the drum when the gears on the second-named. shaft are moved out of mesh with the drum gear on the first-named shaft.

DANIEL S. KIMMERLE. 

